IBM i is an EBCDIC-based operating system that runs on IBM Power Systems and on IBM PureSystems. The name was introduced in 2008, and it is the current evolution of the operating system, previously named i5/OS, and originally named OS/400 when it was introduced with the AS/400 computer system in 1988.It is one of the operating systems supported on IBM Power Systems alongside AIX and Linux as well as on IBM PureSystems alongside AIX, Linux and Windows.